Just a thought that occured to me. Penetrative sex has two distinct motions, the thrust in and the pulling back. I'm a quick student, I know. I love the penetration because it feels so full but I think it's the outstroke that makes me squirm for more, wanting to have it back again. Can anyone else describe the difference they feel between these two motions and, while you certainly can't have one without the other, does one feel better for you?